64329613 has 4 divisors (see below), whose sum is σ = 64414908. Its totient is φ = 64244320.

The previous prime is 64329599. The next prime is 64329631. The reversal of 64329613 is 31692346.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2518569 + 61811044 = 1587^2 + 7862^2 .

It is a cyclic number.

It is not a de Polignac number, because 64329613 - 2²⁵ = 30775181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64329673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41506 + ... + 43027.

It is an arithmetic number, because the mean of its divisors is an integer number (16103727).

Almost surely, 2^64329613 is an apocalyptic number.

It is an amenable number.

64329613 is a deficient number, since it is larger than the sum of its proper divisors (85295).

64329613 is an equidigital number, since it uses as much as digits as its factorization.

64329613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85294.

The product of its digits is 23328, while the sum is 34.

The square root of 64329613 is about 8020.5743559922. The cubic root of 64329613 is about 400.6855182407.

The spelling of 64329613 in words is "sixty-four million, three hundred twenty-nine thousand, six hundred thirteen".